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Abstract

In this paper, we focus on current–voltage (I–V) characteristics in several kinds of quasi-one-dimensional (quasi-1D) nanofibers
to investigate their electronic transport properties covering a wide temperature range
from 300 down to 2 K. Since the complex structures composed of ordered conductive
regions in series with disordered barriers in conducting polymer nanotubes/wires and
CdS nanowires, all measured nonlinearI–Vcharacteristics show temperature and field-dependent features and are well fitted
to the extended fluctuation-induced tunneling and thermal excitation model (Kaiser
expression). However, we find that there are surprisingly similar deviations emerged
between theI–Vdata and fitting curves at the low bias voltages and low temperatures, which can be
possibly ascribed to the electron–electron interaction in such quasi-1D systems with
inhomogeneous nanostructures.